Electron paramagnetic resonance of supported copper oxide catalyst in the reduction of nitric oxide
Journal Article
·
· J. Catal.; (United States)
Electron paramagnetic resonance (EPR) yields information on two aspects of the structure of supported copper oxide catalyst: the degree of oxidation of the copper and the model of dispersion of the oxide. These structural features may have a bearing on the catalytic properties. In situ EPR measurements of copper oxide on alumina were carried out. Mixtures of gases containing oxygen or nitric oxide as the oxidizing component and hydrogen or carbon monoxide as the reducing component were passed through a microreactor mounted in the EPR cavity, and changes in the relative amounts of isolated and clustered Cu(II) ions were determined. The relations between the structural features of the copper oxide that could be discerned by EPR and the catalytic properties were studied. It appears that crystallites of CuO favor the oxidation of carbon monoxide (CO) by oxygen (O/sub 2/), and that isolated copper ions play a role in the reduction of nitric oxide (NO) by hydrogen (H/sub 2/) or by carbon monoxide (CO).
- Research Organization:
- TNO, Delft, Netherlands
- OSTI ID:
- 7334015
- Journal Information:
- J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 41:2; ISSN JCTLA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400104 -- Spectral Procedures-- (-1987)
500200* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
ANIONS
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CATALYTIC EFFECTS
CHALCOGENIDES
CHARGED PARTICLES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COPPER
COPPER COMPOUNDS
COPPER OXIDES
ELECTRON SPIN RESONANCE
ELEMENTS
IONS
KINETICS
MAGNETIC RESONANCE
METALS
NITRIC OXIDE
NITROGEN COMPOUNDS
NITROGEN OXIDES
OXIDATION
OXIDES
OXYGEN COMPOUNDS
REACTION KINETICS
REDUCTION
RESONANCE
STRUCTURAL CHEMICAL ANALYSIS
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
400104 -- Spectral Procedures-- (-1987)
500200* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
ANIONS
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CATALYTIC EFFECTS
CHALCOGENIDES
CHARGED PARTICLES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COPPER
COPPER COMPOUNDS
COPPER OXIDES
ELECTRON SPIN RESONANCE
ELEMENTS
IONS
KINETICS
MAGNETIC RESONANCE
METALS
NITRIC OXIDE
NITROGEN COMPOUNDS
NITROGEN OXIDES
OXIDATION
OXIDES
OXYGEN COMPOUNDS
REACTION KINETICS
REDUCTION
RESONANCE
STRUCTURAL CHEMICAL ANALYSIS
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS